CN105657723A - Method and device for realizing cell merging - Google Patents
Method and device for realizing cell merging Download PDFInfo
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- CN105657723A CN105657723A CN201410668304.5A CN201410668304A CN105657723A CN 105657723 A CN105657723 A CN 105657723A CN 201410668304 A CN201410668304 A CN 201410668304A CN 105657723 A CN105657723 A CN 105657723A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention discloses a method and device for realizing cell merging. The method comprises the following steps of: calculating net gains of various links, except an obtained first fluctuation gain, according to a preset start-up period, wherein the first fluctuation gain is a fluctuation gain introduced by temperature deviation and frequency deviation in radio-frequency processing; and the links are links used for radio-frequency processing and positioned between the input end and the output end of a merged radio-frequency unit; and respectively adjusting gains of various signals passing through the links to the various calculated net gains, and merging the various adjusted signals. By means of the technical scheme provided by the invention, on the premise that the communication quality is ensured, merging of a plurality of cells is realized; and thus, new requirements of coverage in a relatively large area can be satisfied in the event that indoor and outdoor base stations in wireless communication are covered to process resources by using few basebands.
Description
Technical field
The present invention relates to wireless communication technology, in espespecially a kind of wireless base station, it is achieved the method and apparatus of cell combining.
Background technology
Along with in radio communication, indoor and outdoor base station realizes the new demand that large area covers and constantly increases when covering and use less baseband processing resource, in the urgent need to supporting tens even tens cell combining technology. Cell combining technology is applicable to the application scenarios that number of users is relatively fewer, coverage is relatively large. Generally, the coverage of radio frequency unit being called community, therefore cell combining merges also referred to as radio frequency unit. Radio frequency unit, at up direction for receiving the wireless signal in corresponding community from its air interface, carries out analog digital conversion and down-converted to the received signal, the signal after down coversion is sent to Base Band Unit and carries out Base-Band Processing. Wherein, up direction is that mobile terminal sends the direction of signal to radio frequency unit, on the contrary, down direction is radio frequency unit sends the direction of signal to mobile terminal. Cell combining technology is applied on up direction to be undertaken being added in time domain by the signal of multiple air interfaces being derived from radio frequency unit.
Cell combining technology can be applied in before down-converted or afterwards, both are from identical principle. After existing down coversion, carry out cell combining, after down-converted, the signal after two or more down coversions merged, then Base Band Unit be combined after signal carry out Base-Band Processing. Owing to the temperature deviation between each radio frequency unit and frequency departure can introduce fluctuation gain so that the gain that the air interface of each merged radio frequency unit is used for connecting the link between the interface of radio frequency unit to Base Band Unit exists deviation. Wherein, gain is for representing the ability that zooms in or out to signal, and postiive gain represents amplification, and negative gain represents to be reduced, for instance, the postiive gain of link is more big, amplifies more big by the signal of this link.
Existing cell combining technology, owing to the gain of the signal after the down coversion that each above-mentioned link is corresponding is different, it is likely to occur that the high-power signal being derived from air interface is further magnified so before the combining, it is derived from the situation that the little signal of the power of air interface is decreased further, thus the signal that power that the high-power signal disturbing amplified further in the signal after merging reduces further is little occurs, the communication quality of the mobile terminal that the signal that makes power little is corresponding declines, and even resulting in cannot proper communication. Therefore, the method for existing cell combining, the merged community number of support is less, for instance support less than or equal to 8 cell combining, it is clear that cannot meet the new demand that in radio communication, indoor and outdoor base station covers.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of method and apparatus realizing cell combining, it is possible to realize the merging of relatively multiple cell when ensureing communication quality, thus meeting the new demand that in radio communication, indoor and outdoor base station covers.
In order to reach the object of the invention, the invention discloses a kind of method realizing cell combining, including:
According to the startup cycle pre-set, calculate the net gain of each link of the first fluctuation gain not including acquisition; Wherein, the first fluctuation gain is the temperature deviation in radio frequency processing and the fluctuation gain of frequency departure introducing; Link is for the link between input and the outfan of the merged radio frequency unit of radio frequency processing;
Respectively by the Gain tuning of each signal after link to each net gain calculated, and each signal after adjusting is merged process.
Also include before the inventive method: obtain the overall gain of described link and described first fluctuation gain.
Wherein, described calculating net gain G is: net gain G=G1-G2; Wherein, G1 is the overall gain of the described link obtained, and G2 is described first fluctuation gain.
When described radio frequency processing also including simulation automatic gain and processing, after described calculating, described adjustment is to before each net gain calculated, the inventive method also includes: obtains simulation automatic gain and processes the second fluctuation gain introduced, net gain according to the second fluctuation Gain tuning obtained.
Wherein, described adjustment net gain G is: net gain G=G-G3; Wherein, G3 is described second fluctuation gain.
After described adjustment net gain, described adjustment is to before each net gain calculated, and the inventive method also includes: described net gain is reduced N times; Wherein, N is the quantity of the described radio frequency unit pre-set.
Wherein, described described net gain G is reduced N times it be: net gain G=G-10lgN.
The invention also discloses a kind of device realizing cell combining, including computing unit, adjustment unit and merging unit, wherein,
Computing unit, for according to the startup cycle pre-set, calculating the net gain of each link of the first fluctuation gain not including acquisition; Wherein, the fluctuation gain that the first fluctuation gain is the temperature deviation of merged radio frequency unit and frequency departure introduces; Link is the link between input and the outfan of merged radio frequency unit;
Adjustment unit, for respectively by the Gain tuning of each signal after link to the net gain from computing unit, and be sent to merging unit;
Merge unit, for each signal after adjustment unit adjustment being merged process, and the signal after merging is sent to Base Band Unit carries out Base-Band Processing.
Described computing unit is additionally operable to: obtain the overall gain of described link and described first fluctuation gain.
Described calculating net gain G is: net gain G=G1-G2; Wherein, G1 is the overall gain of the described link obtained, and G2 is described first fluctuation gain.
When described radio frequency unit be additionally operable to simulation automatic gain process time, described computing unit is additionally operable to: obtain simulation automatic gain process introduce second fluctuation gain, according to obtain second fluctuation Gain tuning described in net gain.
Described adjustment net gain G is: net gain G=G-G3; Wherein, G3 is described second fluctuation gain.
Described computing unit is additionally operable to: described net gain is reduced N times; Wherein, N is the quantity of the described radio frequency unit pre-set.
Described described net gain G is reduced N times it be: net gain G=G-10lgN.
Compared with prior art, technical solution of the present invention includes: according to the startup cycle pre-set, calculate the net gain of each link of the first fluctuation gain not including acquisition, wherein, the first fluctuation gain is the temperature deviation in radio frequency processing and the fluctuation gain of frequency departure introducing, link is for the link between input and the outfan of the merged radio frequency unit of radio frequency processing, respectively by the Gain tuning of each signal after link to each net gain calculated, and each signal after adjusting is merged process. pass through technical solution of the present invention, achieve and eliminated the temperature deviation of radio frequency unit and the impact of the fluctuation gain of frequency departure introducing by gain adjusting unit, avoid the situation that the signal that high-power signal before occurring merging amplifies further and power is little reduces further, thus avoiding the situation of the little signal of power that the high-power signal disturbing amplified further in the signal occurred after merging reduces further, thus realize more such as tens the even merging of tens communities when ensureing communication quality, therefore the new demand that in radio communication, indoor and outdoor base station covers is met.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from description, or understand by implementing the present invention. The purpose of the present invention and other advantages can be realized by structure specifically noted in description, claims and accompanying drawing and be obtained.
Accompanying drawing explanation
Accompanying drawing is for providing being further appreciated by technical solution of the present invention, and constitutes a part for description, is used for explaining technical scheme, is not intended that the restriction to technical solution of the present invention together with embodiments herein.
Fig. 1 is the flow chart that the present invention realizes the method for cell combining;
Fig. 2 is the composition structural representation that the present invention realizes the device of cell combining.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with accompanying drawing, embodiments of the invention are described in detail. It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
Can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing. And, although illustrate logical order in flow charts, but in some cases, it is possible to perform shown or described step with the order being different from herein.
For convenience of description, hereinafter except limiting further, the radio frequency unit mentioned refers both to merged radio frequency unit.
Fig. 1 is the flow chart that the present invention realizes the method for cell combining, as it is shown in figure 1, include:
Step 101: according to the startup cycle pre-set, calculate the net gain of each link of the first fluctuation gain not including acquisition.
Wherein, the startup cycle can be 10 minutes or 20 minutes.
Wherein, the first fluctuation gain is the temperature deviation in radio frequency processing and the fluctuation gain of frequency departure introducing.
Wherein, link is the link between input and the outfan of the radio frequency unit for radio frequency processing;
Before step 101, the inventive method also includes: obtain overall gain and the first fluctuation gain of link.
Wherein, overall gain is the gain sum of the gain of the simulation process in radio frequency processing and digital processing. Here, simulation process is mainly analog-to-digital conversion process, and numeral combing is mainly down-converted.
Wherein, how to obtain overall gain and the first gain fluctuation value of link, belong to the conventional techniques means of those skilled in the art, be not used in and limit the scope of the invention, repeat no more herein.
Shown in the calculating of the net gain G in step 101 such as formula (1),
G=G1-G2 (1)
In formula (1), G1 is the overall gain of the link obtained, and G2 is the first fluctuation gain.
Step 102: respectively by the Gain tuning of each signal after link to each net gain calculated, and each signal after adjusting is merged process.
Wherein, how to adjust the gain of signal and how to merge implementing of process, belonging to the conventional techniques means of those skilled in the art, be not used in and limit the scope of the invention, repeat no more herein.
Also include after the inventive method: the signal transmission Base Band Unit after merging is carried out Base-Band Processing.
Further,
When simulation process also including simulation automatic gain and processing, after step 101, before step 102, the inventive method also includes: obtains simulation automatic gain and processes the second fluctuation gain introduced, processes the second fluctuation Gain tuning net gain introduced according to the simulation automatic gain obtained.
Wherein, adjust shown in the calculating such as formula (2) of net gain G,
G=G-G3 (2)
Wherein, G3 is the second fluctuation gain.
Wherein, how to obtain the second fluctuation gain, belong to the conventional techniques means of those skilled in the art, be not used in and limit the scope of the invention, repeat no more herein.
It should be noted that, when simulation process also including simulation automatic gain and processing, net gain is adjusted according to formula (2), make the net gain after adjusting eliminates the impact of the second fluctuation gain, thus avoiding the situation of the little signal of power that the high-power signal disturbing amplified further in the signal occurred after merging reduces further.
Further,
After above-mentioned adjustment net gain, before step 102, the inventive method also includes: net gain is reduced N times; Wherein, N is the quantity of the radio frequency unit pre-set.
Wherein, net gain G is reduced shown in the calculating such as formula (3) of N times,
G=G-10lgN (3)
It should be noted that, net gain is adjusted according to formula (3), the signal after each adjustment is made to reduce N times, then the signal time domain after N number of adjustment will be added the signal after being merged in merging treatment, this ensure that the intensity of the signal that the intensity of the signal after merging and not merged radio frequency unit be sent to Base Band Unit is basically identical, it is multiplied thus avoiding the signal intensity after merging and the situation that the situation that Base Band Unit cannot process is overflowed such as the numerical value intensity of the signal after merging occur occurs, therefore make the inventive method support the merging of more radio frequency unit when ensureing communication quality.
Based on what described above skilled addressee readily understands that it is, during link between the input that link is the analog module for simulation process and outfan, after step 101, the inventive method includes: by the Gain tuning of the signal after link received to each net gain calculated; Signal after adjusting is carried out down-converted; Signal after down coversion is merged process, and the signal after merging is sent to Base Band Unit carries out Base-Band Processing.
Fig. 2 is the device that the present invention realizes cell combining, including computing unit, adjustment unit and merging unit, wherein,
Computing unit, for according to the startup cycle pre-set, calculating the net gain of each link of the first fluctuation gain not including acquisition;
Wherein, the fluctuation gain that the first fluctuation gain is the temperature deviation of merged radio frequency unit and frequency departure introduces;
Wherein, link is the link between input and the outfan of merged radio frequency unit; ;
Adjustment unit, for respectively by the Gain tuning of each signal after link to each net gain from computing unit, and be sent to merging unit;
Merge unit, for each signal after adjustment unit adjustment being merged process, and the signal after merging is sent to Base Band Unit carries out Base-Band Processing.
Computing unit is additionally operable to: obtain overall gain and the first fluctuation gain of link.
Wherein, overall gain is the gain sum of the gain of the analog module in radio frequency unit and digital module. Here, analog module is mainly used in carrying out analog-to-digital conversion process, and digital module is mainly used in carrying out down-converted.
The computing formula of the net gain G in computing unit is: G=G1-G2; Wherein, G1 is the overall gain of the link obtained, and G2 is the first fluctuation gain.
Further,
When radio frequency unit is additionally operable to simulation automatic gain process and analog module is additionally operable to simulation automatic gain process, computing unit is additionally operable to: obtains simulation automatic gain and processes the second fluctuation gain introduced, processes the second fluctuation Gain tuning net gain introduced according to the simulation automatic gain obtained.
Wherein, the computing formula adjusting net gain G is: G=G-G3; Wherein, G3 is the second fluctuation gain.
Further,
Computing unit is additionally operable to: net gain is reduced N times; Wherein, N is the quantity of the radio frequency unit pre-set.
Wherein, the computing formula that net gain G reduces N times is: G=G-10lgN.
Based on what described above skilled addressee readily understands that it is, during link between the input that link is analog module and outfan, adjustment unit to each net gain from computing unit, and is sent to digital module for the Gain tuning of the signal after link that will receive; Correspondingly, digital module is for carrying out down-converted to the signal after adjusting, and gives merging unit; Correspondingly, merge unit for the signal after down-converter unit down coversion being merged process, and the signal after merging is sent to Base Band Unit carries out Base-Band Processing.
It should be noted that apparatus of the present invention can be applied not only in a kind of base station form of existing Base Band Unit+radio frequency unit, it is also possible to be applied in the another kind of base station form of existing Base Band Unit+routing unit+radio frequency unit. Such as, the inventive method can apply in the base station form of Base Band Unit (BBU)+slight bridge (pBridge, picoBridge)+slight radio frequency unit (pRRU, picoRRU) of ZTE Co., Ltd's research and development. As being applied in the first base station form above-mentioned, computing unit, adjustment unit and merging unit can be implemented in Base Band Unit; As being applied in the form of above-mentioned the second base station, computing unit and adjustment unit can be implemented in slight bridge, merge unit and can be implemented in Base Band Unit.
It should be noted that above-mentioned the second base station form has been usually applied in source chamber subsystem, therefore the inventive method is suitable for carrying out cell combining in having source chamber subsystem.
Although the embodiment that disclosed herein as it has been described above, but described content is only the embodiment readily appreciating the present invention and adopt, be not limited to the present invention. Technical staff in any art of the present invention; under the premise without departing from the spirit and scope that disclosed herein; any amendment and change can be carried out in the form implemented and details; but the scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims defines.
Claims (14)
1. the method realizing cell combining, it is characterised in that including:
According to the startup cycle pre-set, calculate the net gain of each link of the first fluctuation gain not including acquisition; Wherein, the first fluctuation gain is the temperature deviation in radio frequency processing and the fluctuation gain of frequency departure introducing; Link is for the link between input and the outfan of the merged radio frequency unit of radio frequency processing;
Respectively by the Gain tuning of each signal after link to each net gain calculated, and each signal after adjusting is merged process.
2. method according to claim 1, it is characterised in that also include before the method: obtain the overall gain of described link and described first fluctuation gain.
3. method according to claim 2, it is characterised in that described calculating net gain G is: net gain G=G1-G2; Wherein, G1 is the overall gain of the described link obtained, and G2 is described first fluctuation gain.
4. method according to claim 3, it is characterised in that also include simulation automatic gain in described radio frequency processing and process; After described calculating, described adjustment is to before each net gain calculated, and the method also includes: obtains simulation automatic gain and processes the second fluctuation gain introduced, net gain according to the second fluctuation Gain tuning obtained.
5. method according to claim 4, it is characterised in that described adjustment net gain G is: net gain G=G-G3; Wherein, G3 is described second fluctuation gain.
6. method according to claim 5, it is characterised in that after described adjustment net gain, described adjustment is to before each net gain calculated, and the method also includes: described net gain is reduced N times; Wherein, N is the quantity of the described radio frequency unit pre-set.
7. method according to claim 6, it is characterised in that described described net gain G is reduced N times be: net gain G=G-10lgN.
8. the device realizing cell combining, it is characterised in that include computing unit, adjustment unit and merging unit, wherein,
Computing unit, for according to the startup cycle pre-set, calculating the net gain of each link of the first fluctuation gain not including acquisition; Wherein, the fluctuation gain that the first fluctuation gain is the temperature deviation of merged radio frequency unit and frequency departure introduces; Link is the link between input and the outfan of merged radio frequency unit;
Adjustment unit, for respectively by the Gain tuning of each signal after link to the net gain from computing unit, and be sent to merging unit;
Merge unit, for each signal after adjustment unit adjustment being merged process, and the signal after merging is sent to Base Band Unit carries out Base-Band Processing.
9. device according to claim 8, it is characterised in that described computing unit is additionally operable to: obtain the overall gain of described link and described first fluctuation gain.
10. device according to claim 9, it is characterised in that described calculating net gain G is: net gain G=G1-G2; Wherein, G1 is the overall gain of the described link obtained, and G2 is described first fluctuation gain.
11. device according to claim 10, it is characterized in that, when described radio frequency unit be additionally operable to simulation automatic gain process time, described computing unit is additionally operable to: obtain simulation automatic gain process introduce second fluctuation gain, according to obtain second fluctuation Gain tuning described in net gain.
12. device according to claim 11, it is characterised in that described adjustment net gain G is: net gain G=G-G3; Wherein, G3 is described second fluctuation gain.
13. device according to claim 12, it is characterised in that described computing unit is additionally operable to: described net gain is reduced N times; Wherein, N is the quantity of the described radio frequency unit pre-set.
14. device according to claim 13, it is characterised in that described described net gain G is reduced N times be: net gain G=G-10lgN.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410668304.5A CN105657723A (en) | 2014-11-20 | 2014-11-20 | Method and device for realizing cell merging |
| PCT/CN2015/090021 WO2016078472A1 (en) | 2014-11-20 | 2015-09-18 | Method and apparatus for implementing cell combination |
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| CN201410668304.5A CN105657723A (en) | 2014-11-20 | 2014-11-20 | Method and device for realizing cell merging |
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Application publication date: 20160608 |